MANUFACTURING METHOD FOR METAL INSERT RESIN JOINED MOLDED ARTICLE, AND MANUFACTURING METHOD FOR PRESSURE GAUGE HAVING METAL INSERT RESIN JOINED MOLDED ARTICLE

摘要

PROBLEM TO BE SOLVED: To provide a resin joined molded article excellent in a joining strength between a metal and a resin, in a method of manufacturing the resin joined molded article into which a metal component is inserted. SOLUTION: In the method of manufacturing the resin joined molded article into which the metal component is inserted, the surface of the metal to be inserted is treated with an alkaline or acid solution and then treated further with a silane coupling agent. The metal component thus treated is inserted into a mold of an injection molding machine and injection molding is conducted by using a thermoplastic resin material.